Reddit Admin itself will blanket ban accounts in entire sub-threads with no recourse or explanation.

Participate in a well informed debate on monetary policy, but some idiot downthread went on an anti-semitic rant?

Your account will be banned. Your ip address will be blocked from creating additional accounts. You will receive a link in a message to the message you wrote for which you were banned, but since it was deleted it will be a worthless link. You will receive a link to a form to appeal your ban, which goes straight to dev/null.